This is not part of the NDK. *NO* C++ classes are part of the NDK.
Even if you manage to get this to work, you are using private implementation
details of the platform, and I can guarantee you that your app will break
all over the place on different devices.
On Tue, Oct 25, 2011 at 1:36 AM, HamdiHamZ <hamdi.zr...@gmail.com> wrote:
> Hi folks,
>
> I ma trying to write a media player for Android 2.2. I am using
> NDK_rb6 to build my JNI library written i C/C++ (under Ubuntu
> 11.04)... Actually, I faced a lot of problems of linking and
> dependencies, I resolved a lot of the and I am stuck with this one:
>
> ~/dev/workspace/MyApp/jni/android-out.cpp:95: undefined reference to
> `android::AudioTrack::set(int, unsigned int, int, int, int, unsigned
> int, void (*)(int, void*, void*), void*, int,
> android::sp<android::IMemory> const&, bool, int)'
> collect2: ld returned 1 exit status
>
> However, I found its definition in $(ANDROID_SRC)/frameworks/base/
> media/libmedia/AudioTrack.cpp:
>
> status_t AudioTrack::set(
> int streamType,
> uint32_t sampleRate,
> int format,
> int channels,
> int frameCount,
> uint32_t flags,
> callback_t cbf,
> void* user,
> int notificationFrames,
> const sp<IMemory>& sharedBuffer,
> bool threadCanCallJava,
> int sessionId)
> {
> ...
> }
>
> and in the header that I included (media/audioTrack.h):
>
> /* Initialize an uninitialized AudioTrack.
> * Returned status (from utils/Errors.h) can be:
> * - NO_ERROR: successful intialization
> * - INVALID_OPERATION: AudioTrack is already intitialized
> * - BAD_VALUE: invalid parameter (channels, format,
> sampleRate...)
> * - NO_INIT: audio server or audio hardware not initialized
> * */
> status_t set(int streamType =-1,
> uint32_t sampleRate = 0,
> int format = 0,
> int channels = 0,
> int frameCount = 0,
> uint32_t flags = 0,
> callback_t cbf = 0,
> void* user = 0,
> int notificationFrames = 0,
> const sp<IMemory>& sharedBuffer = 0,
> bool threadCanCallJava = false,
> int sessionId = 0);
>
>
> and I am using it this way:
>
> status = track->set(AudioSystem::MUSIC,
> audec->samplerate,
> AudioSystem::PCM_16_BIT,
> (audec->channels == 1) ?
> AudioSystem::CHANNEL_OUT_MONO : AudioSystem::CHANNEL_OUT_STEREO,
> 0, // frameCount
> 0, // flags
> audioCallback,
> audec, // user when callback
> 0, // notificationFrames
> 0, // shared buffer
> 0);
>
>
>
> So I am not able to see where am I wrong?
>
>
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--
Dianne Hackborn
Android framework engineer
hack...@android.com
Note: please don't send private questions to me, as I don't have time to
provide private support, and so won't reply to such e-mails. All such
questions should be posted on public forums, where I and others can see and
answer them.
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